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Se voltarmos a forma original do polinômio fatorado (5x – 3).(y – 1) teremos: *
a) 5xy – 5x – 3y + 3
b) 5xy + 5x – 3y + 3
c) 5xy – 5x + 3y + 3
d) 5xy – 5x – 3y – 3